#!/bin/bash INTERFACE=mullvad # Set to name of VPN interface shopt -s nullglob # Test whether gateway is connected to the outer world via VPN ping -q -I $INTERFACE 8.8.8.8 -c 4 -i 1 -W 5 >/dev/null 2>&1 if test $? -eq 0; then NEW_STATE=server else NEW_STATE=off fi # Iterate through network interfaces in sys file system for MESH in /sys/class/net/*/mesh; do # Check whether gateway modus needs to be changed OLD_STATE="$(cat $MESH/gw_mode)" [ "$OLD_STATE" == "$NEW_STATE" ] && continue echo $NEW_STATE > $MESH/gw_mode echo 54MBit/54MBit > $MESH/gw_bandwidth logger "batman gateway mode changed to $NEW_STATE" # Check whether gateway modus has been deactivated if [ "$NEW_STATE" == "off" ]; then # Shutdown DHCP server to prevent renewal of leases service isc-dhcp-server stop fi # Check whether gateway modus has been activated if [ "$NEW_STATE" == "server" ]; then # Restart DHCP server and radvd daemon service isc-dhcp-server start fi done